5SF 200 Glass Cartridge Fuse Equivalent & Substitute Parts

Part Overview

The 5SF 200 is a 200 mA, 250 V AC/DC fast-blow glass cartridge fuse in 5mm x 20mm form factor manufactured by Bel Fuse Inc. This component is classified as obsolete, requiring identification of active equivalent parts for ongoing applications. Substitute parts must maintain identical electrical ratings, mechanical dimensions, and functional characteristics to ensure direct compatibility in fuse holder assemblies.

Key Parameters

Parameter	Value
Current Rating	200 mA
Voltage Rating (AC)	250 V
Fuse Type	Cartridge, Glass
Response Time	Fast Blow
Package / Case	5mm x 20mm
Mounting Type	Requires Holder
Breaking Capacity @ Rated Voltage	35A
Operating Temperature Range	-55°C ~ 125°C

Substitute Part Grouping Explanation

Substitution eligibility is determined by strict equivalence across the following parameters:

Current Rating: 200 mA (exact match required)
Voltage Rating: 250 V AC (exact match required)
Response Time: Fast Blow (exact match required)
Physical Dimensions: 5mm x 20mm (exact match required)
Fuse Type: Cartridge, Glass (exact match required)
Breaking Capacity: 35A (exact match required)

All substitute parts listed maintain these core electrical and mechanical specifications. Variations in secondary parameters such as melting I²t, DC cold resistance, and approval agencies do not affect functional substitutability within the specified electrical operating envelope.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Current Rating	Voltage Rating (AC)	Response Time	Package / Case	Breaking Capacity @ Rated Voltage	Melting I²t	DC Cold Resistance (Ohms)	Product Status	RoHS Status
5SF 200	Bel Fuse Inc.	200 mA	250 V	Fast Blow	5mm x 20mm	35A	0.03	1.8	Obsolete	RoHS non-compliant
0034.1509	SCHURTER Inc.	200 mA	250 V	Fast Blow	5mm x 20mm	35A	0.0252	—	Active	ROHS3 Compliant
0217.200MXBP	Littelfuse Inc.	200 mA	250 V	Fast Blow	5mm x 20mm	35A	0.02	1.7	Active	ROHS3 Compliant
0217.200MXP	Littelfuse Inc.	200 mA	250 V	Fast Blow	5mm x 20mm	35A	0.02	1.7	Active	ROHS3 Compliant
0217.200TXP	Littelfuse Inc.	200 mA	250 V	Fast Blow	5mm x 20mm	35A	0.02	1.7	Active	ROHS3 Compliant
0217.200VXP	Littelfuse Inc.	200 mA	250 V	Fast Blow	5mm x 20mm	35A	0.02	1.7	Active	ROHS3 Compliant
0217.200HXP	Littelfuse Inc.	200 mA	250 V	Fast Blow	5mm x 20mm	35A	0.02	1.7	Active	ROHS3 Compliant
0235.200HXP	Littelfuse Inc.	200 mA	250 V	Fast Blow	5mm x 20mm	35A	0.00867	3.15	Active	ROHS3 Compliant
GDB-200MA	Eaton - Electronics Division	200 mA	250 V	Fast Blow	5mm x 20mm	35A	0.016	6.8	Active	—

Engineering Selection Recommendations

All listed substitute parts are electrically and mechanically equivalent to the 5SF 200 and are suitable for direct replacement in applications requiring a 200 mA, 250 V AC/DC fast-blow glass cartridge fuse in 5mm x 20mm form factor.

For new designs and ongoing procurement, Littelfuse 217 series parts (0217.200MXBP, 0217.200MXP, 0217.200TXP, 0217.200VXP, 0217.200HXP) are recommended due to active product status and ROHS3 compliance. The SCHURTER 0034.1509 (FSF 5x20 series) and Littelfuse 0235.200HXP are also active alternatives with full compliance certifications.

The Eaton GDB-200MA remains an active option with VDE and UR certifications, though it carries higher DC cold resistance (6.8 Ohms) compared to other alternatives.

Frequently Asked Questions (FAQ)

Q: Can the 5SF 200 be directly replaced with any of the listed substitute parts?

A: Yes. All substitute parts maintain identical current rating (200 mA), voltage rating (250 V AC), response time (fast blow), physical dimensions (5mm x 20mm), and breaking capacity (35A). Direct mechanical and electrical compatibility is assured within fuse holder assemblies designed for this form factor.

Q: What is the significance of melting I²t variation among substitute parts?

A: Melting I²t represents the thermal energy required to melt the fuse element. Variations (ranging from 0.00867 to 0.03) reflect different fuse element designs but do not affect substitutability, as all parts are rated for identical current and voltage. The variation is within acceptable tolerance for the 200 mA, 250 V fast-blow classification.

Q: Does RoHS compliance affect substitutability?

A: RoHS compliance does not affect electrical or mechanical substitutability. However, for new designs and applications subject to RoHS regulations, ROHS3-compliant alternatives (Littelfuse 217 series, SCHURTER 0034.1509, Littelfuse 0235.200HXP) are preferred over the non-compliant 5SF 200.

Q: Are there differences in approval agencies among substitute parts?

A: Yes. Approval agencies vary (CE, CSA, UL, VDE, CCC, KC, SEMKO, UR). All listed parts carry recognized international certifications. Selection should align with regional regulatory requirements for the end application.

Q: Why is DC cold resistance different across substitute parts?

A: DC cold resistance variation (1.7 to 6.8 Ohms) reflects different fuse element materials and designs. This parameter does not affect AC circuit protection performance at the specified 250 V AC rating and does not impact substitutability for standard AC applications.

Q: Can the 5SF 200 be used in applications requiring ROHS3 compliance?

A: No. The 5SF 200 is RoHS non-compliant. For applications subject to RoHS regulations, use ROHS3-compliant alternatives such as Littelfuse 0217.200MXP, 0217.200TXP, 0217.200VXP, 0217.200HXP, 0217.200MXBP, SCHURTER 0034.1509, or Littelfuse 0235.200HXP.

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